The China–Cornell–Oxford Project was a large observational study conducted throughout the 1980s in rural China, jointly funded by Cornell University, the University of Oxford, and the government of China.[1] In May 1990, The New York Times termed the study "the Grand Prix of epidemiology."[2]

The study examined the diets, lifestyle, and disease characteristics of 6,500 people in 65 rural Chinese counties, comparing the prevalence of disease characteristics, excluding causes of death such as accidents.[4]